CN2527944Y - Cyclone preheater - Google Patents
Cyclone preheater Download PDFInfo
- Publication number
- CN2527944Y CN2527944Y CN 02212925 CN02212925U CN2527944Y CN 2527944 Y CN2527944 Y CN 2527944Y CN 02212925 CN02212925 CN 02212925 CN 02212925 U CN02212925 U CN 02212925U CN 2527944 Y CN2527944 Y CN 2527944Y
- Authority
- CN
- China
- Prior art keywords
- decomposing furnace
- kiln
- rotary kiln
- dore furnace
- last stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
Disclosed is a cyclone pre-heater which pertains to the field of cement machinery. The utility model comprises a last stage cyclone cylinder communicating with the kiln tail flue chamber of a rotary kiln which is characterized in that a decomposing furnace is arranged between the kiln tail flue chamber of a rotary kiln and the last stage cyclone cylinder; a tertiary air duct and a coal injecting pipe that communicate with the decomposing furnace are arranged on the decomposing furnace; the upper part of the decomposing furnace is a gooseneck shaped bending pipe structure, the middle part is composed of hollow columns of unequal diameters with the top of one column connected with the bottom of another column, the lower part is provided with a hollow truncated cone and a shrink mouth connected with the hollow truncated cone. The utility model modifies the prior uptake flue between the kiln tail flue chamber of a rotary kiln and the last stage cyclone cylinder into the decomposing furnace of a certain structure, and the tertiary air duct and the coal injecting pipe that communicate with the decomposing furnace is arranged on the decomposing furnace in order to produce great quantity of heat by burning the coal powder in the decomposing furnace. After absorbing heat, raw meal powder can reach the temperature of above 850 DEG C, and more than 85% of calcium carbonate in the raw meal is decomposed, thus greatly improving the output of a kiln. The designed output is increased by approximately 30-50%, and is about 55% above the actual output.
Description
Technical field
The utility model belongs to cement machinery, is specifically related to the cyclone preheater of cement rotary kiln.
Technical background
The level Four of domestic present application or five-stage cyclone preheater, the pre-thermal efficiency of great majority is lower, goes into the calcium carbonate decomposition rate of kiln material and has only about 30%, has influenced the output of kiln.The five-stage cyclone preheater of prior art has the uptake flue of a cylindricality between rotary kiln kiln tail smoke-box and final stage whirlwind tube, this structure causes the pre-heat effect of cyclone preheater relatively poor, makes the resolution ratio into the kiln material not reach requirement.Generally speaking, production capacity is that the five-stage cyclone preheater output of 12.5t/h also has only about 10t/h; Production capacity is that the kiln output of 25t/h also has only about 21t/h.Thereby both influenced the output of kiln, also increased energy consumption.
The utility model content
The utility model provide a kind of pre-heat effect good, go into the high cyclone preheater of kiln material resolution ratio.Its technical scheme that adopts is: design a kind of cyclone preheater, comprise the final stage whirlwind tube that communicates with rotary kiln kiln tail smoke-box, it is characterized in that between rotary kiln kiln tail smoke-box and the final stage whirlwind tube dore furnace being set, tertiary-air pipe and the coal powder injection pipe communicate with it are set on the dore furnace, the top of dore furnace be gooseneck type bend pipe structure, middle part by lower link on waney hollow cylinder constitute, the bottom sets gradually hollow round platform and and the reducing that links of hollow round platform.
The center line of the hollow round platform of the utility model and the center line of rotary kiln are staggered and are provided with.
The utility model is owing to transform the uptake flue between existing rotary kiln kiln tail smoke-box and the final stage whirlwind tube as the dore furnace of ad hoc structure form, and on dore furnace, be provided with tertiary-air pipe and the coal powder injection pipe that communicates with it, make the coal dust firing in the dore furnace produce huge heat, raw material powder heat absorption back temperature is raised to more than 850 ℃, the above calcium carbonate of in the raw material 85% decomposes, the output of kiln can be increased substantially, design output can improve about 30-50%, improves about 55% than actual production.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model;
Fig. 2 is that the A of Fig. 1 is to structural representation.
The specific embodiment
Between rotary kiln kiln tail smoke-box 2 and the final stage whirlwind tube dore furnace 5 is set, tertiary-air pipe 8 and the coal powder injection pipe 11 that communicates with it is set on dore furnace, the top of dore furnace 5 be gooseneck type bend pipe structure 7, middle part by lower link on waney hollow cylinder constitute, the bottom of dore furnace is hollow round platform 3, the center line of the center line of hollow round platform 3 and rotary kiln 1 is staggered be provided with (being to have eccentric throw between hollow round platform and the rotary kiln).
The high-temp waste gas that comes out in the kiln enters in the dore furnace 5 through rotary kiln kiln tail smoke-box 2 and dore furnace reducing, and the air that draws from the kiln hood cover of rotary kiln also enters in the dore furnace 5 by tertiary-air pipe 8, and dore furnace is provided with coal powder injection pipe 11 can spray into coal dust in stove.During work, when the EGT that comes out in kiln reached the burning-point of coal dust, the coal that enters from coal powder injection pipe 11 took fire, and was fully burned in the air that enters dore furnace 5, produced high-temperature gas.Collected raw material are by tremie pipe 4 from previous stage whirlwind tube 6, enter in the dore furnace 5 after disperseing to contact and carry out heat exchange with high-temperature gas, in exchange, rise to the outlet of dore furnace with thermal current, enter in the final stage whirlwind tube 9, through the centrifugation of final stage whirlwind tube 9, material separates with thermal current after the tremie pipe 10 of final stage whirlwind tube enters in the rotary kiln 1.
Because the coal dust firing in the dore furnace produces huge heat, raw material powder heat absorption back temperature is raised to more than 850 ℃, the above calcium carbonate of 85% in the raw material decomposes, and the output of kiln is increased substantially.
Claims (2)
1. cyclone preheater, comprise the final stage whirlwind tube that communicates with rotary kiln kiln tail smoke-box, it is characterized in that between rotary kiln kiln tail smoke-box and the final stage whirlwind tube dore furnace being set, tertiary-air pipe and the coal powder injection pipe communicate with it are set on the dore furnace, the top of dore furnace be gooseneck type bend pipe structure, middle part by lower link on waney hollow cylinder constitute, the bottom sets gradually hollow round platform and and the reducing that links of hollow round platform.
2. cyclone preheater according to claim 1 is characterized in that the center line of hollow round platform and the center line of rotary kiln are staggered setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02212925 CN2527944Y (en) | 2002-02-09 | 2002-02-09 | Cyclone preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02212925 CN2527944Y (en) | 2002-02-09 | 2002-02-09 | Cyclone preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2527944Y true CN2527944Y (en) | 2002-12-25 |
Family
ID=33692524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02212925 Expired - Fee Related CN2527944Y (en) | 2002-02-09 | 2002-02-09 | Cyclone preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2527944Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376504C (en) * | 2003-10-29 | 2008-03-26 | F.L.施米思公司 | Method and plant for preheating particulate or pulverulent material |
-
2002
- 2002-02-09 CN CN 02212925 patent/CN2527944Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100376504C (en) * | 2003-10-29 | 2008-03-26 | F.L.施米思公司 | Method and plant for preheating particulate or pulverulent material |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |